HTC Arrive and Kyocera Echo bow for Sprint?

Okay, armchair sleuths, this one's for you -- we've got two very legit-looking logos here, but not a lot of proof. Our tipster tells us that both of these high-quality vector graphics are the names of upcoming devices for Sprint, with the HTC Arrive (née Ruby) allegedly an upcoming Windows Phone 7 device, while Kyocera Echo is apparently the retail name for the phone internally known as the Sanyo Orange. It just so happens that the trademark for "HTC Arrive" was registered the very same day we received this logo, so we think we're onto something here, but the truth of the matter is that all of these codenames are falling on virgin ears.